Power head for a pump



Jan. 9, 1934. P. A. MYERS POWER HEAD FOR A PUMP Filed Feb. 12, 19 31 2 Sheets-Sheet l IN IIEN TOR A TTURNE VJ Jan. 9, 1934. P. A. MYERS POWER HEAD FOR A PUMP Filed.Feb. 12, 1931 2 Sheets-Sheet 2 A TTORNEKSv I in connection with means has thereon one or more Patented Jan. 9,

PATENT- OFFICE POWER HEAD FOR A PUMP- Philip A. Myers, Ashland; Ohio,

F. E. Myers and Bro. Company,

a corporation of Ohio Application February 12,

assignor to The Ashland, Ohio,

1931. Serial No. 515,365

15 Claims. (Cl. 'Ik-ld) This invention relates to improvements in power heads, and has for its object to provide a power head for operating a puinp rod in a vertical line.

It is also an object of this invention to provide meansfor operating the pump rod located in a plane substantially in line with the pump rod.

It is also an object of this invention to provide a pump rod in which the thrust is in a vertical line and substantially in line with the operating means for the head.

It is also an object of this invention to provide, for moving the pump rod in a vertical line, an operating shaft which eccentrics. these eccentrics is attached one part of one end of a connecting member, the other end of which is suitably attached to the upper end of the pump rod so that as the eccentrics move the pump rod will move up and down in a vertical line, guided by suitably located guide members.

It is also an object of this invention to provide, in connection with means for moving the pump rod in a vertical line, a lubricant chamber so that the parts are well lubricated.

These and other advantages will appear fromthe following description taken in connection with the drawings, in which there is the preferred embodiment shown.

Referring to the drawings:

Figure 1 is a vertical section through the casing showing the operating means for a power head.

Figure 2 is a vertical section on the line 2-2 of Figure 1.

Figure 3 is a vertical section on the line 3-3 of 4 Figure 1.

Figure 4 is Figure 1. s

The operating mechanism and all of the moving parts of this invention are located within a casing composed of a front wall 1, a rear wall 2, bottom 3 and side walls 4. In the rear wall is a, vertical slot 5, the purpose of which will be described later. In the front and rear walls are bearings 6. These bearings support the ends of a rotating shaft 6a.- The shaft 6a has on each end a gear '7, by which the shaft is rotated. Integral with each gear '1 and between-the gear and one wall of the housing, is an eccentric 8. For rotating the shaft 6a there is provided and suitably supported in the front and rear walls of the casing, a power shaft 9 which has thereon two pinions 10, one meshing with each of the gears 'I.

The parts hereinbefore described. are all located within the casing, but on the shaft 9 without the casing is a pulley 11 for transmitting rotary movement to the shaft 9 and through the gear mechanism to the shaft 6a. Suitably attached to the eccentrics is a connecting frame 12.

a vertical section on the line 4-4 of To each of This frame has two arms 13, one for each of the eccentrics. The extreme end of each arm is formed into an integral semi-circular loop member 14 to engageone-half of the periphery of one of the eccentrics 8. Cooperating with each part 14 is another semi-circular loop member 15, de-

tachable from the part 14 and heldthereto by means of bolts 16 and engaging the other half of the periphery of the eccentric. The eccentrics 8 are circular in shape and located on the shaft 16 ofi center so that when the shaft 6a rotates the eccentrics rotate with it, and by means of the parts 15 and 16 the connecting frame is given a reciprocatory movement.

Connecting the ends of the arms 13 and forming part of the frame structure is an. arm 17 parallel to the shaft 6a. Extending from one end of the arm 17 is an extension 18-, somewhat offset from the arm 13. Extending from the other end of the arm 17, and in an oblique direction, is an extensionle which unites with the extension 18 to form a short arm 20 parallel to the arm 1'3. This arm 20 has extending therefrom a spindle 21 supporting a guide roller 22. This guide roller is guided in its vertical movement by means of guide flanges 23, one on each side of the slot 5 and extending inwardly on the rear wall. Forming a closure for the casing is a cover 24.

There is formed on the lower edge of the slot 5 in the wall 2 alip 25 that may drop from the spindle '21, and convey it back into a lubricant chamber formed in the lower part of the casing. Located on the outer end of the spindle 21 is a sleeve 26, held to the spindle by means of a screw 2'7. This screw passes through a hole in the end of the sleeve 26 into the spindle and holds the sleeve on the spindle 21 so it cannot slip off but may rotate.

Extending downwardly from the sleeve 26 is a pump rod 28 suitably attached to the sleeve. In the present instance this rod has one end threaded into a boss on the lower side of the sleeve. The pump rod 28 extends into a pipe 29 which has on the upper end thereof a discharge 30 attached to the rear wall 2. Resting upon the discharge 30 and in line with the pipe 29 is a cylinder 31. This cylinder has therein a plunger 32 attached to the pump rod 28. As this pump rod moves up and down the plungers move up and down in the cylinder31. .The sleeve 26, pump rod 28 and cylinder 31 are inclosed by means of a casing or closure 33 attached to the rear wall 2 of the casing. In the lower part of the main casing is an oil reservoir 34. The oil reservoir extends up to the shaft 6a so that the parts may be thoroughly lubricated.

I desire to comprehend within my invention such modifications as may be'embraced within my claims and the scope of my invention.

for catching any lubricant.

end of said shaft, and means operated by said eccentrics for causing the reciprocating member to reciprocate.

2. In a power head, a casing having guide flanges thereon, a reciprocating member guided by said flanges, a shaft mounted in said casing for rotation about an axis in a plane of movement of the reciprocating member, an eccentric adjacent each end of said shaft, and means acted upon by the eccentrics to cause the reciprocating member to reciprocate, one part of said means being in line with the flanges and one eccentric.

3. In a power head, a reciprocating member, a shaft having eccentrics thereon, and a frame member connected at one end to said reciprocating member and supported at its other end by the eccentrics for operating the reciprocating member.

4. In a power head, a reciprocating member, a shaft having eccentrics thereon, said shaft being supported for rotation on an axis in a plane through the line of movement of the reciprocating member, and a frame: member connected at one end to the reciprocating member and engaging at its other end said eccentrics whereby rotation of the shaft reciprocates the reciprocating member.

5. In a power head for a pump, a supporting casing, a power shaft, means for driving said power shaft, an eccentric on said power shaft, a pitman reciprocated by said power shaft, means on the casing in line with the eccentric for guiding the free end of the pitman, and sucker rod connected thereto.

6. In a power head for a pump, a supporting casing, a power shaft, means for driving said power shaft, an eccentric adjacent each end of said power shaft, a pitman engaging the eccentrics and reciprocated by said power shaft, means on the casing for guiding the free end of. the pitman, and a sucker rod connected thereto, said guidingmeans comprising a spindle on the pitman, a roller on the spindle interposed between the free end of the pitman and the casing to guide that end of the pitman vertically and in line with one of said eccentrics.

7. In a power head for a pump, the combination of a casing, a shaft mounted therein, gears mounted on said shaft in spaced relationship, means for driving said shaft and gears, a pair of spaced eccentrics mounted on said shaft, a pitman having spaced depending arms and eccentric straps mounted thereon engaging said eccentrics,

means for guiding the upper end of said pitman in a vertical plane as it reciprocates, and a sucker rod connected to said upper end of the pitman.

' 8. In a power head for a pump, the combination of a casing, a shaft mounted therein, gears' mounted on said shaft in spaced relationship,

means for driving said-shaft and gears, a pair of spaced eccentrics mounted on said shaft, a pitman having spaced depending arms and eccentric straps mounted thereon engaging said eccentrics, means 'for guiding theupper end of. said pitman in a vertical plane as it reciprocates, and a sucker rod connected to said upper end of the pitman, said sucker rod reciprocating ,outside of said casing. I

9. In a power-head for a pump, the combination of a casing, a shaft mounted therein, gears pitman, and a roller constituting said guiding means engaging said casing.

' 10. In a power head, the combination of a casing adapted to contain lubricant, a shaft journalled in said casing, spaced gears and eccentrics on said shaft, means for driving said shaft, a triangular-shaped pitman having, depending straps engaging said spaced eccentrics, a shaft on the upper end of said pitman extending parallel to the first-mentioned shaft, a roller on said shaft engaging said casing to guide the upper end of the pitman in a vertical line, and a sucker rod connected to said second shaft.

11. In a power head, the combination of a cas ing adapted to contain lubricant, a shaft journalled in said casing, spaced gears and eccentrics on said shaft, means for driving said shaft, a triangular-shaped pitman having depending straps engaging said spaced eccentrics, a shaft on the upper end of said pitman extending parallel to the first-mentioned shaft, a roller on said shaft engaging said casing to guide the upper end of the pitman in a vertical line, and a suckerrod connected to said second shaft, said casing being arranged to contain lubricant for lubricating said gears, eccentrics and eccentric straps.

12. In a power head, the combination of a casing, a driving shaft journalled therein, a driven shaft journalled therein, gearing on said respective shafts engaging one another, eccentrics on said drivenshaft, a pitman having eccentric straps engaging said eccentrics between said drivingand driven shafts, means in line with one eccentric for guiding the upper end of said pitman, and a sucker rod connected thereto, said sucker rod and a portion of said pitman extending outside of said casing.

13. In a power head, the combination of a casing, adriving shaft, a driven shaft parallel thereto, a driving connection between said shafts, a pair of eccentrics on the driven shaft, a pitman connected thereto, means in line with one eccentric to guide the upper end of the pitman in a vertical plane passing through the driven shaft, a sucker rod connected to the upper end of the pitman adapted to reciprocate in said same plane.

14. A power head comprising a two-compartment casing, one compartment forming a lubricant container and having therein an operating shaft, a reciprocating member connected to the shaft and extending into the other compartment, a pump rod connected to the reciprocating member, and means forming a division between the compartments for guiding the reciprocating member.

15. A power head comprising a two-compartment casing, 0ne,compartment forming a lubricant container and having therein a shaft having adjacent each end an eccentric, a reciprocating member connected to the eccentric and reciprocated thereby and extending into the other compartment, a'pump rod connected to the reciprocating member in said other compartment, and means forming a partition between the compartments for guiding the reciprocating member.

PHILIP-A. MYERS. 

